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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 391 · 40 questions
TalentJR

The method (Spot the type): Read the question and name the topic: HCF/LCM, fraction, ratio, percent … Use that lesson’s method and write each step. Check: is the answer sensible in size and units?

NameDateTime takenScore ___ / 40
  1. 1.5.03 + 5.1 =
  2. 2.Write 1/2 as a percent.
  3. 3.39 + 3 × 9 − 21 =
  4. 4.Round 83.79 to one decimal place. =
  5. 5.Find the LCM of 10 and 6.
  6. 6.Find the LCM of 6 and 15.
  7. 7.The HCF of two numbers is 9 and their LCM is 252. One of the numbers is 36. What is the other number?
  8. 8.The ratio of boys to girls in a class is 7 : 2. There are 42 boys. How many girls are there?
  9. 9.Three temple bells ring every 8, 10 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  10. 10.Find the LCM of 9 and 21.
  11. 11.Two tanks hold 100 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  12. 12.Divide ₹55 between Saanvi and Rohan in the ratio 2 : 9. How much does Saanvi get (in ₹)?
  13. 13.3 : 2 = 12 : ?
  14. 14.What is the smallest number you must add to 226 so that it divides exactly by 4?
  15. 15.Find the LCM of 14, 3 and 15.
  16. 16.Find the third proportional to 6 and 18 (that is, 6 : 18 = 18 : ?).
  17. 17.27 + 5 × 3 − 26 =
  18. 18.Two tanks hold 210 litres and 270 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  19. 19.What is the smallest number you must take away from 511 so that it divides exactly by 11?
  20. 20.What is the smallest number you must add to 331 so that it divides exactly by 4?
  21. 21.How many factors does 33 have?
  22. 22.What is 1/2 of 56 kg?
  23. 23.Find the LCM of 12, 3 and 14.
  24. 24.4 : 6 = 12 : ?
  25. 25.65.1 ÷ 7 =
  26. 26.Find the HCF of 48 and 18.
  27. 27.Divide ₹165 between Manav and Ishaan in the ratio 6 : 5. How much does Manav get (in ₹)?
  28. 28.Which is closest to 297 × 28? (Round each number first.) (a) 18000 (b) 90000 (c) 9000 (d) 900
  29. 29.34 + 5 × 3 − 25 =
  30. 30.What is 150% of 328?
  31. 31.Find the LCM of 15, 4 and 3.
  32. 32.80% of a number is 264. What is the number?
  33. 33.Round 67.67 to one decimal place. =
  34. 34.Find the LCM of 5, 13 and 2.
  35. 35.What percent of 20 is 1?
  36. 36.50% of a number is 71. What is the number?
  37. 37.Round 77346 to the nearest hundred.
  38. 38.Which is closest to 395 + 203 + 103? (a) 900 (b) 600 (c) 800 (d) 700
  39. 39.Divide ₹645 between Meera and Nisha in the ratio 8 : 7. How much does Meera get (in ₹)?
  40. 40.Two tanks hold 350 litres and 300 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?

Answer key

  1. 10.13
  2. 50
  3. 45
  4. 83.8
  5. 30
  6. 30
  7. 63
  8. 12
  9. 120
  10. 63
  11. 20
  12. 10
  13. 8
  14. 2
  15. 210
  16. 54
  17. 16
  18. 30
  19. 5
  20. 1
  21. 4
  22. 28
  23. 84
  24. 18
  25. 9.3
  26. 6
  27. 90
  28. 9000
  29. 24
  30. 492
  31. 60
  32. 330
  33. 67.7
  34. 130
  35. 5
  36. 142
  37. 77300
  38. 700
  39. 344
  40. 50

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